_CLEARCOLOR (function)

The _CLEARCOLOR function returns the current transparent color of an image or page.

Syntax

result& = _CLEARCOLOR [Source_Handle&]

Description

• If Source_Handle& is omitted, it is assumed to be the current destination write page.
• If Source_Handle& is an invalid handle value(-1), then an invalid handle value is returned.
• In color modes using a palette, the index of the current transparent color value is returned, or -1 if no transparent color is set.
• In 32-bit color modes, zero is returned.
• Returns the color that currently is transparent, or if no color is transparent -1 without error.
• A _CLEARCOLOR statement can set the transparent color of an image or screen.
• NOTE: Default 32 bit backgrounds are clear black or _RGBA(0, 0, 0, 0). Use CLS to make the black opaque.

See also

• _CLEARCOLOR (sets a clear color)
• _SETALPHA (sets color transparency)
• Images

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